Lawn mower tractor



FIG. 1 is a right front perspective view of a lawn mower tractor showing my new design;

FIG. 2 is a left front perspective view thereof;

FIG. 3 is a top plan view thereof;

FIG. 4 is right side view thereof;

FIG. 5 is a left side view thereof;

FIG. 6 is a front view thereof; and,

FIG. 7 is a rear view thereof. 

The ornamental design for “lawn mower tractor,” as shown and described. 